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Re: How to clone a table in LJ2-friendly way?

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On 31/08/2011, at 7:36 AM, Alexander Gladysh wrote:
> No, as I understand it, whole function must be pairs-free for this to
> work. Maybe I'm wrong, that's a wild guess. (You may try to move the
> loop to a separate function to try this hypothesis.)
That doesn't seem to be the case:
test.lua:
local function a()
 local t = {}
 for i = 1, 100000 do
 t[i] = i
 end
 
 local ps, is = 0, 0
 for _, v in pairs(t) do
 ps = ps + v
 end
 for _, v in ipairs(t) do
 is = is + v
 end
 return ps, is
end
print(a())
--
$ luajit -jdump test.lua 
...
---- TRACE 3 start test.lua:12
That is, a trace was started at line 12 - the start of the ipairs loop (What I don't understand in this case is why a trace was never even attempted for the pairs loop)
Cheers,
Geoff

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